Valve.



No. 863.553. I PATENTED AUG. 13, w07. J. G. NOLEN.

VALVE.

APPLICATION FILED 0012.21. 1904.

UNTTED STATES PATENT erosion.

JAMES G. NOLEN, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO AUTO- MATICFIRE PROTECTION COMPANY, A CORPORATION OF MAINE.

VALVE Specification of Letters Patent.

Patented Aug. 13. 1907.

lo all whom it may concern? llo it known that I, .JAMES G. NOLEN, of Chicago, in the county oi Cook and State oi Illinois, have invented certain new and useiul Improvements in Valves; and I hereby declare that the following is a full,`clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this speci- VIication.

My invention relates to improvements in valves, and

has for its primary object to provide a device for trans-v mitting motion from the movable member of` an ,inclosed valve to an extraneous part or parts, which means will be simple, durable, reliable and liquid tight.

In the drawings, wherein I have illustrated the embodiment of my invention in several constructions differing indetails, Figure l is a central vertical section of a valve construction embodying my invention. Fig. 2 is a similar view of a modified embodiment of my invention, and, Fig. 3 is a similar View of a still different embodiment of my invention.

Throughout the drawings like numerals of reference refer always to like parts.

Referring now to the embodiment ofV my' invention illustrated in Fig. 1, A indicates generally a valve casing having connection with two pipe sections B and C.

Within the valve Casing A is the movable element a of a flap valve having an arm 4 pivoted as at and provided adjacent its pivot with an upwardly projecting nose 6.

7 indicates a hollow, preferably tubular structure threaded into a'suitable opening in the valve casing A and having open communication therewith. At its top the tube 7 is closed by a flexible diaphragm D, preferably metal, which forms a yielding part of the complete valve casing. The diaphragm D is secured to the tube 7 in any suitable way to make water tight connection therewith, as for instance by the annular cap d the iange d whereof is screw threaded for engagement with a screw threaded end ofthe tube 7.

An operating member o r 'stem E adapted to. be instrumental in effecting connection between the movable valve member A and exterior` devices passing through the diaphragm D, preferably centrally thereof, andat right angles to the general plane of the diaphragm, and makes connection therewith. Tothis end the lowerportion of the stem E is preferably screw threaded and passes through an apertureof siiitable size in the center of the diaphragm D, the stem being securedin position relative to said diaphragm and effecting a firm and water-tight joint therewith, suitable check nuts e-e being preferably provided on opposite sides of the diaphragm and preferably locked in position relative to the diaphragm and the stem by solder. The lower or inner extremity of the stem E is arranged in proximity to and preferably in Contact with the stud 6 upon the arm of the valve a, and is arranged in such a way that the movement of the valve-member a andthe colmomiiant` movement `oi the stud 6 operates to move the lower extremity of stem E from the normal position wherein il, is maintained by its connection with the diaphragm to dotted line position. Such movement of the lower extremity of the stem causes the stem to practically pivot upon its connection with the diaphragm I), the outer end of` the-stem moving out of alinement with the aperture-in the diaphragm on the side thereof opposite that toward which the inner extremity of the stem moves. Such movement of the stem causes thc `dia.- phragm to buckle slightly, the portion of the diaphragm on-one side of a line drawn at right angles to the direction of movement of the stem bending outward and the portion of the diaphragm upon the opposite side oi said line bending inward. Thus the area of the chamber closed by said diaphragm remains practically unchanged under all conditions, the outwardbending on the one side of the diaphragm compensating for the inward bending of the other side thereof when the diasoA phragin buckles under the movement oi the stem E.

phragm is so slight as to be scarcely,v if atall, perceptible to the eye, but yet the diaphragm exerts a very appreciable effect to spring the stem back to its normal position. I

It will be Yapparent that the outer end of the stem may be associated in any suitable Way with devices to be operated, such, for instance, as the call mechanism of a signal circuit, electrical contact parts, or like devices, not deemed necessary here to illustrate.

Referring now to the construction which in Fig. 2, the check valve a/ within the valve casing A/ is pivoted as at E and is provided with a hook-shaped nose 9 in rear oi the pivot, said nose 9 preferably having its outer surface l0 curved on an arc struck with the pivot as a center. v

The stem. E is securedV by a cap d or other suitable connection upon a hollow boss ll, made at any suitable point upon the valve casing A and the stem E is pivotally` secured thereto in the manner heretofore described, the position of the parts being such that the stern E, when the valve is in closed position, underlies the forwardly projecting end of the nose 9. It will be apparent now that the parts described form a limited movement connection between the movable valve element a and the stein E, the nose 9, during th(` first part of the movement of valve element a ltoward open position moving the cwith vthe inner extremity of the stem E. When, however, the point of the nose 9 passes the end of said stem, the curved surface l0 of the valve member passes below the end of the stem E withoht moving said stem further, but without permitting the latter to move back to normal position. In this way I provide for an extended movement of the valve mem-A 'ber a with a concomitant movement of the stem E, to

only a limited extent, the remaining movement ofv said valve member having no effect on stem E. i

It will be apparent that in the form of mechanism shown in Fig'. 2, asfwell as that shown in Fig. 1, the spring tendency of the diaphragm D operates to resist movement of the valve member a or. a and to restore said valve member to closed position upon the release or relief of the opening pressure.

In Fig.y 3 I have shown a form of device wherein th operation of the stem E and its diaphragm act to assist the movement of the movable valve member to' open position and to oppose its restoration to closed position.' In said ,valve the check valve member a2 within the valve casing A2 is pivoted in the usual manner as at 12, the opposite extremity 13 ofthe valve projecting be yond the seat thereof. `The diaphragm D is secured preferably by means such as the cap heretofo'r'e described', in a suitable bushing 14 screwed or otherwise secured in thevalve casing to provide open communication between the valve casing and the diaphragm.

The stem E projecting through the diaphragm and vsecured thereto preferably rin the manner heretofore described, is limited as to its range of movement by the walls of bushing 14, and at its innermost end underlies the projecting extremity 13 of the valve member a2.

Means independent of the valve member a2 are provided i tendingr to move said stem E in such direction that its inner extremity will follow the movement of the extremity 13 of the valve member a2 during-the opening of the valve, such means being herein indicated as from the inner extremity oi the stem E and the weight W, or other means employed for the purpose, servesV to depress the outer end of stem E and to maintain the said stem in such position until the return movementoi the valve member a2 restores the stem to its original or full line position.

While I have herein described in some deta-il several specific embodiments of my invention, which I believe l-to be novel and respectively .advantageous for various purposes, Ido not desire to be understood as limiting the application of my invention to such forms as those herein shownfurther than as specied in the claims, as it will be apparent that vmy invention might be embodied in diverse forms and numerous changes in the mechanical .construction might be made without departing from the spirit and scope of my invention.

Having thus described my invention, what I claim .and desire to secure by Letters Patent, of the United States, isz- 1. The combination with a valve casing having a relai tively -large aperture therein, and a movable valve member within 'the casing of a resilient metal diaphragm for Vtightly closing said aperture'in the casing. ,and a'stem of relatively' small diameter extending through said daphragm from the exterior of the casing to the interior thereof, wholly supported by the diaphragm, whereby its movements may buckle the diaphragm in either direction. the inner en d of the stem being operatively associated with the valve for movement consistently therewith. 2, In. combination with a valve casing having an aperture, therein, and a valve within vthe casing, of a resilient diaphragm supported at its edges only and centrally free in` the aperture for buckling movement on either side of` lts normal plane. and a stem, extending into and without 'the casing, making tight connection with the diaphragm at its center, the, inner end of said stem being associated with the valve for movemcnt,therewith as the valve opens, to put'the diaphragm under tensiontending to return the stem to normal position.

3. In a device of the character descr bed,a valve casing having an opening therein, a metal diaphragm covering said opening. secured only at its edges, vand centrally free of support `and resistance against buckling, a stem passingfcentrally through the diaphragm und connected there lwith to pivot therein, the inner end of the steni'heing associated with the valve andl arranged'to have Aits movement in one direction opposed by the Weight of the valve,

and means tending t o positively move the inner end in if MARY F. ALLEN. 

